Hitachi, Ltd.

Kawasaki Steel Corporation

Itsuo Shimizu

Yasuo Morooka

Yasunori Katayama

Yutaka Saito

Masahiro Tobise

Toshihiko Chino

Yuji Yamasawa

Harumi Maruyama

Taiko Takano

A non-interference control method and device in which an object to be controlled, which is controlled by a plurality of operation quantities and at least one control quantity, is divided into a plurality of partial control systems so that each of the partial control systems has at least one operation quantity and at least one partial control system has more than two operation or control quantities, wherein to the operation quantity in one partial control system is added a compensating element which annuls influences exerted by other partial control systems on said one partial control system, said object to be controlled being controlled on the basis of the relevant compensated operation quantity.

Non-interference control method and device

A speed control method and apparatus for a motor driven by output of a power conversion unit, wherein a first current command value is inputted to derive a drooping variable, a deviation between a detected speed value of the motor and a speed command value is derived, the first current command value is derived on the basis of a value obtained by compensating the deviation with the drooping variable, the speed command value is inputted to derive an acceleration or deceleration current value for accelerating or decelerating the motor, and the first current command value and the acceleration or deceleration current value are added together to derive a second current command value and control the output current of the power conversion unit on the basis of the second current command value.

Motor speed control method and apparatus with drooping compensation

Growing community of inventors

Katsuta, Japan

Itsuo Shimizu